OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:16:4a:b9:22:c4:e0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:16:ff:63:10:88:95
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:ca:3c:2b:40:a4:c8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:4d:7c:42
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:4d:7c:42
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
